# US 12,180,871 B1 · Exhaust gas purification device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,180,871 B1
- Document ID: US12180871B1
- Status: Granted
- Kind: B1
- Application number: 18/717,254
- Filed: 2022-11-14
- Published: 2024-12-12
- Granted: 2024-12-31
- Earliest claimed: 2022-11-14
- Assignees: Subaru Corporation
- Applicants: Subaru Corporation
- Inventors: Hiroyuki Minokoshi
- Web page: https://patentgrep.com/patent/US12180871B1

## CPC

- F01N 3/023: using means for regenerating the filters, e.g. by burning trapped particles
- F01N 3/021: by means of filters
- F01N 9/002: {of filter regeneration}
- F01N 11/00: Monitoring or diagnostic devices for exhaust-gas treatment apparatus
- F01N 2900/1411: Exhaust gas flow rate, e.g. mass flow rate or volumetric flow rate
- F01N 2900/16: said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N 2900/1606: Particle filter loading or soot amount
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)

## Abstract

An exhaust gas purification device includes a filter to be provided in an exhaust passage coupled to an engine, a rotary vane to be provided downstream of the filter in the exhaust passage, and a control device including one or more processors and one or more memories coupled to the one or more processors. The one or more processors are configured to execute, based on a rotational speed of the rotary vane, processing including one or more of estimation processing of estimating an accumulation amount of particulate matter in the filter and regeneration processing of regenerating the filter.

## Claims

### Claim 1

An exhaust gas purification device comprising:
a filter to be provided in an exhaust passage coupled to an engine;
a rotary vane to be provided downstream of the filter in the exhaust passage; and
a control device comprising one or more processors and one or more memories coupled to the one or more processors, wherein
the one or more processors are configured to execute, based on a rotational speed of the rotary vane, processing comprising one or both of estimation processing of estimating an accumulation amount of particulate matter in the filter and regeneration processing of regenerating the filter.

### Claim 2 (depends on 1)

The exhaust gas purification device according to claim 1, wherein
the one or more processors are configured to execute, based on a transition of the rotational speed of the rotary vane, execute the estimation processing or the regeneration processing.

### Claim 3 (depends on 2)

The exhaust gas purification device according to claim 2, wherein
the one or more processors are configured to execute the estimation processing or the regeneration processing when, as an operational time of the engine elapses, the rotational speed of the rotary vane increases to a first rotational speed or higher and then decreases to a second rotational speed or lower the second rotational speed being lower than the first rotational speed.

### Claim 4 (depends on 1)

The exhaust gas purification device according to claim 1, wherein
the one or more processors are configured to execute the estimation processing or the regeneration processing, based on the rotational speed of the rotary vane when a flow rate of an exhaust gas flowing through the exhaust passage is in a steady state.

### Claim 5 (depends on 1)

The exhaust gas purification device according to claim 1, wherein
the one or more processors are configured to execute the estimation processing or the regeneration processing, based on a correction value obtained by correcting the rotational speed of the rotary vane with a flow rate of an exhaust gas flowing through the exhaust passage.

### Claim 6 (depends on 2)

The exhaust gas purification device according to claim 2, wherein
the one or more processors are configured to execute the estimation processing or the regeneration processing, based on the rotational speed of the rotary vane when a flow rate of an exhaust gas flowing through the exhaust passage is in a steady state.

### Claim 7 (depends on 2)

The exhaust gas purification device according to claim 2, wherein
the one or more processors are configured to execute the estimation processing or the regeneration processing, based on a correction value obtained by correcting the rotational speed of the rotary vane with a flow rate of an exhaust gas flowing through the exhaust passage.